Grok 3
xAI · 2025-02-19
Grok 3 is xAI's flagship model released in February 2025, trained on the Colossus supercluster with roughly 10× the compute of its predecessor and featuring large-scale reinforcement learning for extended chain-of-thought reasoning. It introduced a Think mode and Big Brain mode for multi-step problem solving, a built-in DeepSearch capability for real-time web retrieval, and a 1 million-token context window. Grok 3 demonstrated significant improvements over Grok 2 in mathematics, coding, world knowledge, and instruction following.